Marine construction



Sept. 27, 1949. G. MUNRO 2,482,927

D MARINE CONSTRUCTION Filed 0d. 5, 1945 a; 2 Sheets-Sheet 1 INVENTOR.

ATTORNEY.

Sept. 27, 1949.

G. MUNRO MARINE CONSTRUCTION 2 Sheets-Sheet 2 Filed Oct. 5, 1945 I4 2 4 v r w ATTORNEY.

Patented Sept. 27, 1949 UNITED; STATES PATENT "OFFICE Gordon Munro, Dorchester, Mass. Application October 5, 1945, Serial No. 620,579

This invention relates to marine construction and more particularly to a novel chine construction in hulls having metal bottom plating and metal bottom frames.

The primary object of the invention is to provide structure in the vicinity of the chine which is simple in formation and assembly.

A further object of the invention is the provision of structure in the vicinity of the chine which is adapted for use in the fabrication of composite hulls wherein the bottom plating and frames may be of metal and the side frames and planking of wood.

The invention is particularly applicable to the production of composite hulls containing a fiat bottom metal structure, as of steel, and will be described in connection with the fabrication of such a hull, which is shown in the accompanying drawings, in which Fig. 1 is a transverse cross-sectional detail of a ship hull showing the structure in the vicinity of the chine;

Fig. 2 is a longitudinal cross-sectional detail of the hull looking outboard;

Fig. 3 is a full transverse cross-sectional view of the hull; and

Fig. 4 is a bottom plan of the hull.

As shown in Figs. 1 and 2, this invention is concerned particularly with the chine construction in a hull having flat metal bottom plating I0, bottom metal angle iron frames l2, suitably spaced longitudinally of the hull, and wooden side planking 10. As shown in Fig. 2, each bottom angle frame [2 includes a vertical web l4 and a horizontal web [5. Each vertical web It terminates abeam the ship in an overcut extension it (Fig. 1), the top surface I! of which provides an angled surface substantially normal to the plane of the adjacent exterior surface of the hull. Each surface H forms a seat for the upper web 28 of a chine angle 30 which extends from stem to stern along the marginal portion of the bottom plating i c with its lower web 32 welded along its toe edge as at 34 to the bottom metal plating l9 and with its angle facing inboard, as shown in Fig. 1, so that its upper web 28 rests against each of the surfaces ll of frame extensions 35, to each of which the upper web 28 may be welded along its under face as shown in the drawings. .Side frames 40 extend downwardly inboard of the angle 38 to abut bottom plating I6 and each side frame 40 is bolted as by bolts 42 to the lower web Id of a frame l2 and by bolts M to a metal gusset plate 46 which is welded to the upper web l of a frame l2, all as shown in 2 Claims. (Cl. 114-65) .Fig. 2. Side planking :so,.. 5|; :52 is then applied across and affixed to side frames 40, with the bottom planking 56 based upon the upper surface of chine angle web 28 and, preferably, as shown, with the exterior surface of the planking fairing in with the outer surface of chine angle Web As is usual in the case of wooden side planln'ng, caulking 54 is provided.

Gusset plates 45 and webs I5 form a bed for inboard planking 55.

While'the construction shown in Figs. 1 and 2 is generally applicable to any form of ship hull having the essential features there shown, there is illustrated in Figs. 3 and 4, for purposes of clarih, a complete hull incorporating the previously described chine construction. In this case, the hull as a whole embodies a double hull construction of the type broadly claimed in my Patent No. 2,361,409; it includes an upper fiat bottom hull l0 and a second lower hull 88, the upper hull 'Hl being provided with the flat metal bottom plating l0 and wooden side planking ill of Figs. 1 and 2, and the performance characteristics of the upper hull being improved by the addition thereto of the reinforced metal lower flat bottom hull 80 extending approximately the Water-length line of the hull as shown in Fig.4. In the vicinity of the chines, the structure includes the invention herein described, with angle irons 39 extending throughout the longitudinal extent of thechine lines and being supported by and welded to extensions I6 of frames l2 and forming a base for side planking.

By reason of the fact that long lengths of angle iron may be utilized as elements 30, a great saving in labor is secured as the angles 30 afford accurate bases for subsequent rapid positioning and application of side planking.

It will be understood that bottom frames l2 may be spaced in accordance with the particular dimensions of a particular hull and that the dimensions shown in the'drawings are given merely by way of an example suitable for a typical application.

I claim:

1. In ship hull construction having transverse bottom metal angle frames spaced longitudinally of the hull, metal bottom plating and wooden side frames, in combination, a chine-forming base for side construction comprising angle irons extending longitudinally along marginal beam edge portions of said bottom plating, each of said angle irons being disposed with its angle facing inboard and with its lower deb welded to the bottom plating at an obtuse angle thereto and its upper web welded to end edges of said angle iron frames, and wooden side planking aflixed to said wooden frames and based upon and extending upwardly from the upper webs of said angle irons.

2. In chined ship hull construction having flat metal bottom plating, a chine-forming base for side construction comprising a series of transverse metal bottom frames spaced longitudinally of said hull and welded to said bottom plating, each of said frames having an overcut extension at at least one end thereof providing an upper eX-- tension surface lying in a plane substantialy normal to the adjacent external plane of said hull, and angle irons extending along marginal beam edge portions of said bottom plating on each side of said hull with their angles facing inboard and with the lower web of each angle welded to the bottom plating at an obtuse angle thereto and the upper web of each angle being seated on said frame extension upper surfaces and welded thereto, wooden side frames bolted to said bottom frames inboard of said angle irons, vertically disposed steel gussets bolted to said wooden frames and welded to said metal bottom frames, and wooden side planking affixed to said side frames and based upon and extending upwardly from said angle iron upper webs.

GORDON MUNRO.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,453,223 French Apr. 24, 1923 2,058,282 Whitesell Oct. 20, 1936 V 7 FOREIGN PATENTS Number Country Date 1,320 Great Britain Jan. 27, 1915 

